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US 7,803,449 B2Granted
Optical film and process for production the same, antireflection film and process for production the same, polarizing plate including the film, liquid crystal display device including the polarizing plate, and liquid crystal display device
AssigneeFUJIFILM Corporation
InventorsKatsumi Inoue, Tetsuya Asakura
Life of this patent
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Abstract
An optical film comprising a transparent support and a layer having internal scattering properties, wherein the optical film has an image sharpness, as measured in an optical comb width of 0.5 mm in conformity to JIS K7105, of from 30.0% to 99.9%, a haze value as caused by surface scattering of less than 3%, and a haze value as caused by internal scattering of from 15 to 40%.
Claims21
An optical film comprising:
- a transparent support;
- and a layer having internal scattering properties, wherein the optical film has an image sharpness, as measured in an optical comb width of 0.5 mm in conformity to JIS K7105, of from 30.0% to 99.9%, a haze value as caused by surface scattering of not more than 1.0%, and a haze value as caused by internal scattering of from 20 to 32%,
- wherein the layer having internal scattering properties contains a translucent resin and at least one of a translucent particle and has a thickness of from 3 μm to 12 μm;
- the translucent particle has a particle size of from 3 to 4 μm and is contained in an amount of from 5 to 30% by weight of a whole of solids contained in the layer having internal scattering properties;
- the translucent resin has a refractive index falling within the range of 1.52±0.02;
- and 30% or more of the translucent particle has a difference in refractive index from the translucent resin of 0.008 or more and not more than 0.05.
3 more elements
An antireflection film comprising:
- a transparent support;
- a layer having internal scattering properties;
- and a low refractive index layer in this order, wherein the low refractive index layer has a refractive index of at least 0.04 lower than a refractive index of the layer having internal scattering properties, and the antireflection film has an integral reflectance of not more than 3.5%, an image sharpness, as measured in an optical comb width of 0.5 mm in conformity to JIS K7105, of from 30.0% to 99.9%, a haze value as caused by surface scattering of not more than 1.0%, and a haze value as caused by internal scattering of from 20 to 32%,
- wherein the layer having internal scattering properties contains a translucent resin and at least one of a translucent particle and has a thickness of from 3 μm to 12 μm;
- the translucent particle has a particle size of from 3 to 4 μm and is contained in an amount of from 5 to 30% by weight of a whole of solids contained in the layer having internal scattering properties;
- the translucent resin has a refractive index falling within the range of 1.52±0.02;
- and 30% or more of the translucent particle has a difference in refractive index from the translucent resin of 0.008 or more and not more than 0.05.
4 more elements
Dependencies are inferred from the claim text.